Methods: A randomized controlled trial will be conducted in children 2 to 17 years old with a radio graphically confirmed distal radial buckle fracture. Exclusion criteria will include skeletal maturity, previous distal radius fracture, concurrent other fracture(s), osteogenesis imperfecta or other metabolic bone disease. Enrolled subjects will be randomized to receive either a short arm cast or a volar wrist splint. The pediatric emergency department attending physician will be responsible for applying or directly supervising the immobilization technique. All subjects' radiographs will be reviewed by a pediatric orthopaedic surgeon with 1 day to confirm diagnosis and measure fracture angulation. Those subjects with unacceptable angulation will be called and asked to return to the ED or orthopaedic clinic for re-evaluation.